Improvement in combination-padlocks



P. DICKINSON.

COMBINATION PADLOCK.

Patented Dec.1l2,1876..

No.18'5,ZZO.

THE GRAPHIC CDN.

Umano STATES l PATENT Grrroa.

PHILEMON DICKINSON, OF NEWARK, NEW JERSEY.

IMPROVEMENT lN COMBINATION-PADLQCAKS.

Specification forming part of Letters Patent No. 185,220, dated December12, 1876; application tiled october 23, 1876. Y

To all whom z't may concern Be it known that I, PHILEMON DIcKINsoN, ofNewark, in the county of Essex and State of New Jersey, have invented anImprovement in Padlocks, of which the following is a specification Thispadlock, which I term Dickinsons Improved Keyless Padlock, is providedwith a dial at one end of the cylindrical case, a shackle entering theother end of the case, in the edges of which are notches. Connected withthe spindle of the dial are circular' tumblers, and these are turned toenter the notches in the shackle. By `this construction I com bine apermutating dial-lock with the shackle similar to that in theScandinavian jail-lock.

In the drawing, Figure l is a vertical section of the lock. Fig. 2 is aplan ofthe tumblers, spindle, and dial-plate removed from the lock. Fig.3 is a plan ofthe permutatingplate connecting the spindle and innertumbler. Fig. 4 is an elevation of thelock-case. Fig. 5 is an elevationof the parts of the lock removed from the case, and Figs. 6 and 7 aredetached sectional views.

The case a is cylindrical, with one end open, the other end closed,except the two holes for the U-shaped shackle I), the legs of which areparallel. The open end of the case a is closed by the disk c, that setsin flush and rests against a shoulder in the case, and there are twoscrews or turning-rivets, d, in line with the holes in the shackle, andwith the heads removed on one side, so as to allow the disk to be putinto place, and it is secured by giving a partial rotation to thesescrews d by an instrument inserted through the shackle-holes, so as toturn the edges of the heads over the shoulders prepared for them. Thisallows the lock to be taken apart whenl the shackle b is ont ofthe same,but ei'ectually prevents any access to these screws when the shackle isin place. The disk c has a central tube or sleeve, c', around which areplaced circular notched vdisks k, forming permutating-tumblers. Theseare separated by disks or rings, and each is provided with a stud orprojection, i, whereby one can be made to move the other, in the mannersimilar to the circular tumblers in dial-locks. Each disk k is notched,so that the shackle may be inserted when the notches in the disks areall in line with the shackleholes of the case, and when these tumblersare revolved in locking the lock their edges enter the notches in theshackle b.' rllhe upper edge of the top disk k rests against the innersurface k ofthe case, (see Fig. 6,) so that it'will withstand any strainin attempting to withdraw the shackle.

In order to set the tumblers, l make use of the dial n, that is upon thespindle o, which passes through the tube or sleeve c', and there is apermutating-plate, r, at the end ot' the spindle o, secured by a screwand washer, s, and this permutating-plate has a star-shaped opening forthe end ot' the spindle, as seen in Fig. 3, so that it can be changed tovary the relative positions of the notches upon the lirst tumbler withthe dial-marks on the dial and case.

ing and to facilita te this operation there are recesses t in the edgeof the dial and case, that are to be brought together at thestarting-point in setting the dials.

In operating the lock the dial n is revolved sufficiently to set thetumbler nearest the disk c, then reversed, and the one above that isset,l

and so on; and, lastly, the top tumbler lc is set and the shackle can bewithdrawn.

I remark that the shackle is shown as adapted to being drawn entirelyout; but if one leg is made shorter than the other, it may be drawnpartly out and then swung around.

I claim as my inventionl. The combination, in apadlock, of the shackle,notched on its parallel legs, with lthe circular notched tumblers 7c andthe dialm., connected with such tumblers, substantially as set forth.

2. The disk c, held into the case a by the screws d, or tm'uing-buttons,in combination with the removable shackle alud circular tumblers,substantially as set forth.

3. The dial n, corresponding in size, or nearly so, with the cylindricalcase a of the padlock, and provided with recesses t in the adjacentedges of the dial and case, iu combina.-

tion with the spring-dog u, cavities l, and circular tumblers,substantially as set forth.

Signed by me this 20th day of October, A. D. 1876.

PHILEMON DICKINSON. Witnesses:

GEoT. PINGKNEY, GHAs. H. SMITH.

